Floor construction



Jan. 15, 1929.

Filed April 13, 1925 l N V E N T OR 1751256197 {7l/P551,

Patented J'an. 15, 1929.

`AUNirJr-:D- i STATES PATENT OFFICE.

HERBERT W. REEL, OF CHICAGO, ILLINOIS, A'SSIG-NOR T0 UNITED STATES GYPSUM COMPANY, OF CHICAGO,ILLI NOIS, A CORPORATION OF ILLINOIS.

FLOOR CONSTRUCTION.

Application iled April 13, 1925, Serial No. 22,525.

This invention relates to improvements in building construction and more particularly to a floor construction which can also be employed to roofs if desired.

In the erection of poured composition floors or roofs it is customary to build a false work, place the domes for forming voids in the slab, and the desired reinforcements thereon, then pour the plastic mixture thereover, and after the mixture becomes hardened remove the false work, lay the floor finish or water proofing on the upper side, as the case may be, and plaster'or paint the under side, as desired. As the upper surface ofthe false work becomes the mold or form for the under side of l the floor or roof and forms the ceiling of the room below, it'requires careful select-ing, fitting and erecting ofthispart of the' false Work to make a uniformlysmooth ceiling 'or under surface.

It is an object of this invention to provide a floor or roof construction that will obviate.

the time and trouble of selecting and fitting the body of false work as well as provide means for evenly spacing the domes from each other and which will present a smooth even under side of the same character throughout to forni a ceiling the decoration of which. may he accomplished wit-h or without plastei'ing.

Reference is made to the accompanying sheet ofdrawing illustrating a preferred forni of this invention, and it is understood that minor detail changes may be made without departing from the scope thereof.

In the' drawing:

Figure 1 is a View in perspective. partly in section of a portionfof a floor or roo'f constructed in accordance with" this invention.

Figure 2 is an enlarged detail View in ,verti' cal section, illustrating the lirst step employed in erecting such a. floor or roof.

Figure 3 is an enlarged detail view in perspective of the improved dome employed in this construction, with the adjacent end in vertical sections.

Figure 4 is an enlarged ydetail/view in perspective of the improved spacing member employedin this construction, with the adjacent end in vertical section. f

In carrying out this invention it is preferred to employ domes of plasticmaterial for providingthe voids in the body of .the

` ,poured material, such as illustrated, and

which possessa smooth even under surface' to which plaster'will readily adhere. Improved spacing members of calcined gypsum are employed which not only serve as a. centering for the domes but also possess an even under surface to which plaster will readily adhere.

.To constructa Hoor or roof in accordance 'with this invent-ion a false work or tempoopposite sides of theJ spacers 3 and in contact therewith,` as shown in Figure 2. This simple false work then supports the domes and spacers which form the ceiling of the room below in the desired plane of such ceiling .and which act as the' bottom of the mold or form for the plastic body. Reinforcement, such as metal rods 4 are then placed in position between the domes and the plastic body 5 then poured over and ,between the 4domes 2 and leveled thereabove in the desired plane of the floor or roof and allowed to harden. When completely hardenedv they false work is removed and the floor finish orroof water proofing is added to the upper surface.

The domes 2 and spacers 3 with or withouta'l fibrous covering are both preferably l made of calcined gypsum which has been cast or otherwise formed while plasticl into the desired shapes. The upper longitudinal edges of the domes are preferably beveled and a longitudinal groove formed along each longitudinal side adjacent to thev lower edge to key same to the plastic body subsequently poured around the voids. The spacers are preferably ofthe same length` as the Idomes and are constructed of a width equal to the desired space between the lines of domes, and the spacers are provided with a longitudinal groove along each longitudinal edge with the top surface narrower than the lower to provide means of keying the spacer to the plastic bod IiiT order to protect the surfaces and insure the shape, the spacers 3 are constructed ico in the manner illustrated in the-enlarged view, Figure 4, in which the calcine'd gypsum .vor composition body 5 is covered with fibrous covering sheets 6 and 7 adhering thereto, the bottom cover sheet 6 passing over the under surface with longitudinal side margins extending about the grooved edges 8 onto the upper surface of the body and the top cover sheet 7 adhering` to the'upper sur- 'face engages and is secured to the overlap- 'ping upper margins of the bottom sheet lby a portion of the body material or other adhesive. rlhe sharp corners at the upper and se l dome, so that when the false work is removed.

lower longitudinal edges resulting from the groove 8 are fragile and readily broken unless protected by a covering which will insure the key on the upper side and an even line of jointure to the edges of the domes on the under side.' y

In accordance'with this invention the top, bottom and longitudinal sides of the dome 2 are alsoi covered with brous Covering sheets 9 and 10 adhering thereto the side margin of which overlap in the longitudinal groove 1l 'formed along each side adjacent to the lower edge, with' the loweredge of said groove preferably aligned belowthe upper surface of the spacers 3 when in place on the false work.' This fibrous covering insures .a continuous square edge on the lower side of each the bottom surfaces 6 ofthe spacers 3 and bottom surfaces 10 of the domes 2 will both, be protected by the lsame character of covering material separated by straight llnes where they join each other.

surface is not unsightly for a ceiling and as it is protected by thejibroussheets adhering to the bodies of the domes and spacers it may` be left in that condition or may-be painted, -papered or otherwise decorated as desired, furthermore, the fibrous covering adhering to the bodies of the domes and spacers provides a surface'to which plaster will readily bond without further treatment, if itis desired to apply a coat ofwall plaster to the ceiling.

What l claim is:

1. LA .roof orfioor of poured plastic matei `rial embedding on the under side thereof .alv ternate .tcontacting series of preformed gypsum domes and gypsum s 'acers of the same material each having longitudinall grooves in the adjacent surfaces for keying the plastic Such an under material thereto, the spacer being wider at the bottomthan at the top to permit the plastic material to flow into the longitudinal keying groove and fitting closely-between the domes at thebottom, whereby a smooth uniform under surface of homogeneous material is provided.

2. A spacer for poured roof 'or floor construction formed of Iplastic material having a fibrous covering adhering to thc longitudinal surfaces, sald fibrous covering bonding with the plastic material, said spacer being of greater width thang/thickness, and having grooves along the opposite covered longitudinal narrower sides to form key ways.

3, A spacer for poured roof or floor construction formed of' plastic materialhaving a fibrous covering adhering'to the longitudi-v .nal surfaces, the top surface being of less edge extending from the corners of the upper surface to the corners of the bottom surface,`

and a-librous cover slieet adhering to the bottom and groovdsurfaces overlapped andysecured to a fibrous cover sheet adhering to the top surface. t

5. In a roof or floor of poured plastic material, the combination with spaced apart domes of plasticmaterial and having a fibrous covering, of iiat spacers' of similar plastic material covered with 'a fibrous coating adhering thereto, the bottom. face of the spacer being wider than the top one with longitudinal grooved edges so that the bottom surface of the spacer will contact with thg opposite 'domes 'and space them apart, and the upper surface of'the'spacer will be at a distance from the adjacent edges of the dome so that a key of .plastic material will flow into the longitudinal grooves'of" the spacer, the

plastic material bondin ywith the fibrous.I

covering of the spacer an the domes.

' l HERBERT W.` REEL. 

